Improved kiln for annealing glass



UNITED STATES PATENT QEETCE.

THOMAS B. ATTERBURY, OF PITTSBURG, PENNSYLVANIA.

IMPROVED KILN FOR ANNEALING GLASS.

Speciiication forming part of Letters Patent No. 43.27, dated June 28, 1864.

To all whom it may concern:

Be it known that I, THOMAS B. ATTER- BURY, of Pittsburg, in the county of Alle.- gheny and State of Pennsylvania, have invented a new Kiln for Annealing Glassware; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure lis a perspective view illustrating the operation of my invention. Fig. 2 is atop view of the kiln as seen by removing the circLilar arch. Fig. 3 is a front elevation of the kiln. Fig. 4 is a vertical transverse section, and Fig. 5 is atop view in detail showing the construction of the circular carriage and also the railway upon which this carriage moves.

Similar letters of reference indicate corresponding parts in the-several figures.

My invention consists in a leer or kiln for annealing glassware, which is so constructed that the ware will be subjected to a uniform degree of heat in passing through one portion ot' said kiln, and then gra-dually cizoled in leaving said heated portion, as will be hereinafter described.

My invention also consists in a novel con struction and arrangement of the parts, substantially as will be hereinafter described.

To enable others skilled in the art to make and use my invention, I will describe its construction and operation.

In the accompanying drawings, A represents a circular platform or carriage, which is made up of flanged segmental sections having their tapering edges so formed and put together as to give the carriage a level upper surface. This circular carriage is mounted upon tlan ged wheels, c a, the axles ot' which are arranged in lines radiating from the center, around which the carriage revolves, and these wheels travel upon rails b b, which are composed of sections, as shown in Fig. 5, secured down upon a circular foundation ot' masonry in such manner as to provide against the springing up of the rails in consequence of the extremes of temperature to which they are subjected. The ends of the rails b b are prevented from being thrust out of place laterally by .wed ging and notching these ends and fitting the sections together as represented in Fig. 5. The foundation upon which the carriage A revolves is represented by B, Figs. 1, 2, and 3, and it is provided with one or more chambers, l, which form ash-pits for the nre-places. In the present instance only one of lthese chambers is made, as only one re is used; but it may be found desirable in very large leers or tempering-kilns to use a number of iires arranged side by side at and near the point where the glassware is introduced into the annealing-passage. When the traveling carriage is properly constructed and mounted upon its rails b b, an arch D is built over it extending from the closed end D around to the opening, which is shown in Figs. l and 3, and which is intended to allow of the ware being removed from the carriage A. The

4ing where I have represented a chimney, E.l

By constructin g the arched chamber, through which the ware is conveyed, as above described, the ware will be subjected to a uniform heat in passing through one portion of the leer, after which the ware will be gradually cooled by passing through a chamber which gradually increases in size from the 1ocality of the chimney to the delivery-opening.

By constructing the annealing-chamber as above described-t'. e., with an arch flaring from a certain point toward both endsthere will be a draft from the tire-chamber at d, passing toward the chimney E, and also another slight draft in an opposite direction through the opposite end of the arch. I thus obtain in a single passage two drafts, one being heated air and the other cool air, one heating the ware and the other graduallycooling and annealing it, so that the annealed work is delivered at the opposite end of the arch to that in which the nre is placed, and at or near a point where the work is introduced into the annealing-chamber. G represents the waredoor through which the ware to be :annealed is passed into the annealingchamber. This is the hottest point, it being nearest the iire or fires, as the case may be.

When that portion of the carriage A opposite said door is lled with ware the carriage is moved a short distance by means of a chain which is hooked to the exposed portion ofthe carriage and wound around the windlass g by means ot' the spur-wheels and crank, as represented in Fig. l. In this way the car riage is rotated and filled, and as fast as the l'annealed ware emerges from the arch at the delivery-opening it is .removed from, thev carrage. Instead of employing thc chain and windlass to move the carriage A, it may be moved by means of a circular rack and a driving-pinion appliel to it7 or in any other convenient manner.

I am aware that a circularly-xnoving pan covered by an arch is not new in connection with a glassannealing furnace. Therefore I do not claim such'as my invention 5 but What I claim as new is l. A leer or kiln for annealing glassware, constructed with a depressed arch having inlets and outlets for the glass, combined with the endless closed carriage and circular rail way7 substantially as described.

2. Depressing the circular arch at or near the chimney E, substantially in the mannfr and for the purposes described.

3. A leer for annealing glassware, which is so constructed that the ware is subjected to an intense but nearly uniform heating process in passing through one portion of the annealingchamber of the leer, and is then subjected to a gradually cooling process in leaving the point where the chimney-hue is located, sub stantially as described.

Witnesses: T. B. ATTERBURY.

A. S. NICHOLSON, J. WARD NronoLsoN. 

